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A restaurant has three sources of revenue: eat-in orders, takeout orders, and the bar. The daily revenue from each source is normally distributed with mean and standard deviation shown in the table below.
Mean Standard DeviationEat in $5,780 $142Takeout 641 78Bar 712 72
a. Will the total revenue on a day be normally distributed?b. What are the mean and standard deviation of the total revenue on a particular day?c. What is the probability that the revenue will exceed $7,000 on a particular day?
Based on anthropological reports in which the status of women is scored on a 10-point scale, the mean and standard deviation across many cultures are known. A new culture is found in which there is an unusual family arrangement.
They hope to use a sample size such that, with probability 0.95, the error will not exceed 0.04. What sample size will ensure this, regardless of what sample proportion value occurs when they gather the sample?
The same probability of getting choosen. In how many different ways can the teams be chosen so taht the number of employees on each project are as follows: 5 1 10.
What method of random selection can be used to determine which women to select in quantitative research?
In a study of the lizard Sceloporis occidentalis, researchers examined field-caught lizards for infection by the malarial parasite Plasmodium. To help assess the ecological impact of malarial infection, researchers tested 15 infected and 15 noninf..
Construct a frequency distribution and construct a histogram for the following data and use seven intervals, starting with 30-39.
A sample of waterfall heights in Hawaii show that the average height is 261.5 feet with a standard deviation of 13.76 feet.
At the 0,05 level, can we conclude that women think men are less kind, gentle, and thoughtful in the later survey compared with the earlier one?
Calculate the least square estimates of the slope and intercept. What is the estimate ofσ2? Find the estimate of the mean deflection ifthe stress level can be limited to 69%.
A random sample of 346 individuals is selected, and the individuals are classified according to their smoking habits and the smoking habits of their parents. The results are given in the contingency table below.
Calculate the limits within which the weight of the packets should lie assuming that the machine is not been classified as faulty.
a) Determine the proportion of instances that the duration was less than 240 seconds. Also express the proportion as a percent. (hint: proportion is number of successes divided by total number.)
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